iMac 27" screen shaking and flickers

Discussion in 'iMac' started by Nesbi90, May 10, 2014.

  1. Nesbi90 macrumors newbie

    Joined:
    May 10, 2014
    #1
    I'm looking for help to solve my problem with the screen of my iMac.
    The screen flickers and shaking.
    I have searched and found the groom guide how to fixer dim problems, but not this problem.

    if I connect an external monitor, then the problem is not on the external display, so do not think the graphics card is faulty


    Are there any iMac experts out there who can help?

    Link to video: http://www.youtube.com/watch?v=iF0kQf8MAqk&sns=em
     
  2. Habberkuk macrumors member

    Joined:
    Mar 2, 2013
    Location:
    Under your bed...
    #2
    Have you recently opened it?
    It sounds like a failing LCD, a lose connection, bad cable, or things like that.
     
  3. touchUpInside macrumors member

    touchUpInside

    Joined:
    May 4, 2014
    Location:
    UTC -07:00
  4. Nesbi90 thread starter macrumors newbie

    Joined:
    May 10, 2014
    #4
    I buy it as defective with this error. I opened it, to check if there was a loose connection
     
  5. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #5
    I think that you have a bad internal video cable, called a display port cable.

    That's a good first step to replace that cable.
    If the issue continues, then you probably need a replacement LCD panel.
    (That's likely why it was sold broken. :D )
     
  6. Nesbi90 thread starter macrumors newbie

    Joined:
    May 10, 2014
    #6
    I have just test lvds cable with a multimeter and it work :(
    So The screen is broken
     
  7. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #7
    Unless you have a method (and the specs) to test for inter-lead capacitance and impedance (and know if it should be high or low) - all you are doing is testing that cable for continuity. All you can say is that the cable might be good, but best test is to try with another cable.
    Then again - it was sold to you broken, and yes, likely the LCD panel...
     

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